diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 6c0dda9c20c..ddea63d55c0 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -2144,6 +2144,8 @@ in {
 
   PSQueue = callPackage ../development/libraries/haskell/PSQueue {};
 
+  psqueues = callPackage ../development/libraries/haskell/psqueues {};
+
   publicsuffixlist = callPackage ../development/libraries/haskell/publicsuffixlist {};
 
   pureMD5 = callPackage ../development/libraries/haskell/pureMD5 {};
@@ -2364,6 +2366,8 @@ in {
 
   skein = callPackage ../development/libraries/haskell/skein {};
 
+  slackApi = callPackage ../development/libraries/haskell/slack-api {};
+
   smallcheck = callPackage ../development/libraries/haskell/smallcheck {};
 
   smtLib = callPackage ../development/libraries/haskell/smtLib {};